Jesse alexandee



No. 752,611. v v P'ATENTED FBB.16,1904.. J. ALEXANDER.

TYPE WRITER CARRIAGE CONSTRUCTION.

APPLIOATIDNAIILED ran. 6. 1903.

N0 MODEL.

INVENTOR lwwexawder- ATTDRNEY m: Mann-s warms co PNGYOLITHU. WASHINGTON. u. c.

UNITED STATES Patented February 16, 1904.,

PATENT OFFICE.

JESSE ALEXANDER, OF BROOKLYN, NEW YORK, ASSIGNOR OF ONE-HALF TO JAMES WILLIAM HENNESSEY, OF RICHMOND COUNTY, NEW YORK.

TYPE-WRITER CARRIAGE CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 752,611, dated February 16, 1904.

Application filed February 6, 1903.

To all whom it may concern.-

Be it known that I, J ESSE ALEXANDER, a citizen of the United States, residing at Brooklyn, in the county of Kings, State of New York, have invented certain new and useful Improvements in Type-Writer Carriage Construction, of which the following is a full, clear, and exact description.

My invention relates to improvements in type-writers, and particularly to the carriage construction,

In type-writers of this character having a revoluble platen it is often desirable that the operator be able to readily remove the platen and general carriage structure from the other parts of the machine, in order to substitute a carriage having a different capacity for performing special work.

It is the object of this invention to so construct the carriage mechanism and locate the respective parts that it may be quickly removed from the main body of the machine by a simple operation and replaced readily,when desired.

The invention consists in forming a carriage structure which may be put in place on the frame of the machine and clamped thereto by adjustable clamps. The parts are so formed as to facilitate the assembling, the mounting uponfand separating from the main carriage structure,which carries portions of the escapement mechanism for the feed of the carriage. These will be more fully seen in the following specification and accompanying drawings.

Figure 1 is a plan view of parts of a typewriter embodying the improvements of my invention. Fig. 2 is a front elevation of the same, parts being insection. Fig. 3 is an end elevation of the same. Fig. 4 is a side view of a modified form of the clamping device for iecciiring the carriage structure to the machine- 1 is a part of the main frame of the machine. 2 is the back plate, which extends across from side to side of the machine.

3 is a bar extending from one side to the other, but in front of the back plate.

4 is a carriage-plate which rests upon the Serial No. 142,177. (No model.)

back plate 2 of the machine and has the two brackets 5 5 at either end.

6 is a rear guide-rail which is mounted upon the brackets 5 5. The guide-rail 6 is secured to the brackets 5 5 by thumb-screws 65 65 so as to be removable.

7 is a guide-sleeve fitting about the rail 6 and adapted to slide longitudinally thereon.

8 is a bar which is secured to the guidesleeve 7 and connects the two side frames 9 9 of the carriage.

10 10 are side plates pivoted to the side frames 9 9 and in which the platen-shaft 11 is revolubly mounted. The platen and other parts of the carriage structure than those necessary for illustrating this invention are omitted from the drawings in order that the essential features may be more clearly seen and understood.

12 is a bar which unites the two lower front ends of the carriage-frames 9 9.

13 and 14 are guide-rollers carried by the connecting machine-frame bar 3. 15 is a rod which connects the front lower ends of the .two platen-plates 10 10. This is the auxiliary rail, with which a platen-shifting mechanism coacts, as particularly shown in my application, Serial No. 142,175, filed herewith.

Normally the carriage structure as thus far described rests upon the guide-rails 6 and the guide-roller 14. When the carriage is shifted to the upper-case position, the machine being of the double-case type the guide-rail 15 is lifted by a suitable mechanism, and the car: riage then is guided by means of the rear rail 6, the auxiliary rail 15, and also held down by means of the guide-roller 13.

18 and 19 are a ratchet and gear, respectively, constituting a part of the escapement mechanism for limiting the feed of the carriage from right to left.

20 is a rack which is secured to the shaft 21 and thus pivotally mounted.

22 is a spring for throwing-the rack into normal engagement with the gear 19, and 23 is a handle by means of which the position of the rack 20 may be manually controlled.

The other parts of the feed mechanism are not concerned in this invention and need not be further referredto.

24 24 are pins carried by the back plate of the machine, which extend upward and are adapted to fit into holes or recesses in the carriage-plate 4, so that the latter may be mounted in its proper position relatively to the other parts of the machine. Obviously the pin might be carried by the carriage-plate 4 and lit into a recess in the back plate 2.

25 is an arm pivoted at 26 to the back plate and having a handle or knob 27 This arm 25 is formed of strong but springy metalas, for instance, phosphor-bronze or tempered steel. These arms are provided, preferably, at the two sides of the machine, as shown particularly in Fig. 1. By means of them the carriage-plate 4, and consequently all of the other parts of the carriage structure carried thereby, may be securely clamped to the machine. To facilitate the clamping of these parts together in this manner and in order that the pressure to be exerted between the parts may be adjusted, I have provided the cam 28, which is mounted on the upper surface of the carriage-plate 4. By swinging the arm 25 about its pivot 26, so that the outer end will slide up the surface of the cam, the tension between the parts may be increased or decreased, as may be found desirable in the operation of the machine. Preferably this cam is formed with teeth adapted to be engaged by the wedge-shaped pin 29, carried by the arm 25. By this construction the parts may be eflectually united, so that there is no danger of accidental disengagement during the operation of the machine. When it is desired to remove the carriage structure from the machine, it is simply necessary to swing the two arms 25 25 out of engagement with their cams. The carriage is then free to be lifted from the back plate 2. At the instant of separating the parts it will be noted that the construction of the front guide of the carriage and the location of the escapement mechanism and rack is such that the carriage may be readily removed.

In Fig. 4 I have shown a modification of the form of clamp by means of which the carriage structure is secured to the machine. In this form 30 is a screw which may be used in place of the screw 26 of Fig. 1. 31 is the arm of the clamp, and 32 is the head-of a pin having the lower end 33. 34 is a spring for holding the parts normally in the position shown in Fig. 4. It will thus be seen that the tension of the spring 34 will cause the end of the pin 33 to be held downwardly in a manner similar to that in which the spring-arm 25 holds the end 29 in engagement with the cam 28. The construction is simple and quickly applied or adjusted, as desired.

What I claim is 1. A type-writer carriage construction including a back plate, a carriage-plate extending from side to side, pins projecting from one of said plates into recesses in the other, and a'spring-pressed arm carried by said back plate and extending over said carriage-plate for holding thetwo togethen 2. A type-writer carriage construction including a back plate, a carriage-plate extending from side to side, pins projecting from one of said plates into a recess in the other, a spring-pressed arm carried by said back plate and extending over said carriage-plate for holding the. two together, brackets carried at both ends of said carriage-plate, a guiderod carried by said brackets, carriage-frames, a bar connecting said frames, and means for slidably mounting said bar on said rod.

3. A type-writer construction including a stationary main back plate, a continuous carriage-plate mounted thereon, a spring-pressed arm for removably holding said plates together, all the remainder of the carriage mechanism being removable with said carriageplate.

4. A type-writer construction including a main back plate, a carriage-plate extending from side to side and adapted to be mounted on said back plate, a spring-pressed arm pivotally mounted in said back plate and extending over and engaging the said carriage-plate.

5. A type-writer construction including a main back plate, a carriage-plate extending from side to side and adapted to be mounted on said back plate, a spring-pressed arm pivotally mounted in said back plate and extending over and engaging the said carriage-plate, and means for adjustably regulating the pressure of said arm.

6. A type-writer carriage construction including a back plate, a carriage-plate, a carriage structure supported thereby, an inclined cam carried by said carriage-plate, an arm adapted to engage with said cam for adjustably securing said carriage-plate against said back plate.

7. A type-writer carriage construction including a back plate, a carriage-plate mounted thereon, an inclined toothed cam carried by said carriage-plate, and an arm pivotally mounted for engaging the said cam.

8. A type-writer carnage construction 1nvcluding a back plate, acarriage-plate mounted thereon, an inclined toothed cam carried by said carriage-plate, and a spring-pressed arm pivotally mounted for engaging the said cam.

9. A type-wrlter carriage constructlon in- -cluding a back plate, pins carried thereby, a

carriage-plate having recesses to correspond to said pins, and a plvoted arm for holdmg the said plates together.

10. A type-writer carriage construction including a back plate, a carriage-plate extending from side to side supported by said back plate, spring-pressed means for holding the said plates in engagement with one another,

a front stationary frame, a carriage structure adapted to be supported by said carriage-plate, a front guide-rail, a roller carried by said stationary frame supporting said rail, and an arm extending in the front of said'rail and carrying an upper guide above said rail.

11. A type-writer carriage construction including a back plate, a carriage-plate adapted to be supported thereby and cut away to make allowance for the position of the escapement mechanism, and adjustable springpressed means for holding the said plates together.

12. A carriage construction including a back plate, a carriage-plate supported thereby, brackets mounted on said carriage-plate, a guide-rail resting on said brackets, screws for connecting said brackets to said rail said carriage-plate extending from side to side of the machine and adjustable spring-pressed arms for securing said plates together.

13. A carriage construction including a stationary supporting-plate, a carriage-plate, and pivotally mounted spring pressed arms for holding said plates together.

14. A carriage construction including a supporting-plate, a carriage-plate mounted thereon, inclined notched cams carried by said carriage-plate and pivoted arms adapted to coact therewith.

15. A carriage construction including a back plate, a continuous carriage-plate, brackets carried thereby for supporting a carriage structure, an inclined notched cam mounted on said carriage-plate atboth ends, and springpressed pivotally-mounted arms adapted to 00- act therewith for the purpose specified,

JESSE ALEXANDER.

Witnesses:

RoB'r. S. ALLYN, L. VREELAND. 

